Yes, a pilot license and its associated ratings do have validity limits and can expire over time, especially through medical certificates, type ratings, and recurrent checks, so pilots must continuously maintain validity by completing periodic medical examinations, flight reviews, simulator checks, and recurrent training required by aviation authorities and ICAO standards; if anything expires, pilots typically need refresher training, re-check flights, or revalidation exams depending on how long the lapse has been, making continuous compliance with regulatory and proficiency requirements essential for keeping a license valid for professional flying.